package other;

public class Example {
    String str = new String("good");
    char[] ch = {'a','b','c'};

    public static void main(String[] args) {
        Example ex =  new Example();
        ex.exchange(ex.str,ex.ch);
        System.out.print(ex.str+"and");
        System.out.print(ex.ch);

    }

    public void exchange(String str ,char[] ch){
        str = "test ok";
        ch[0] = 'g';
    }
}
